Defense contributions help NASA's 50-year legacy
The seven original Mercury astronauts, posing next to an Air Force F-106 Delta Dart, were military fighter pilots before joining NASA's astronaut program. From left to right: M. Scott Carpenter, L. Gordon Cooper, John H. Glenn Jr., Virgil I. "Gus" Grissom Jr., Walter M. Schirra Jr., Alan B. Shepard Jr. and Donald K. "Deke" Slayton. (NASA photo)